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ZEISS DTI thermal imaging cameras. For more discoveries at night, and during the day.

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  1. Miles Green

    Pentax Q

    Q There are many discussions with samples on PentaxForums. The Q requires amazingly sharp lens to give sharp images at high magnification: top quality fast primes. Diffraction sets in early, already visible at f/4. To get the effective focal length that accounts for the crop factor, multiply...
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